Common Name(s): Modified starch,clean beauty starch thickener,natural polymer
CAS Number: 113894-92-1
DESCRIPTION
What It Does: Provides natural starch polymer thickening and sensory modification for clean beauty formulations.
Why It's Used: Natural carbomer alternative — hydroxypropyl starch phosphate provides thickening and film formation comparable to synthetic polymers from a naturally-derived starch source for clean beauty formulations avoiding synthetic polymer thickeners.
How It Works: Starch (corn or potato) modified with hydroxypropyl and phosphate groups provides water-stable gel formation. biodegradable from natural starch backbone. film formation on skin provides sensory modification. thickening via starch polymer chain entanglement. cosmos conditional approval.
Typically Found In: Clean beauty gels,natural texture modifiers,biodegradable polymer formulas
TECHNICAL DETAILS
Primary Category: Active ingredient – cosmetic active
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%–5%
SOURCING & ETHICS
Vegan Status: Conditional - supplier confirmation required
Halal Status: Unverified - supplier confirmation required
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier. [audit 2026-07-29 rev2: the record's own source_notes does not assert a non-animal origin, or instructs the reader to verify with the supplier; "yes" asserts knowledge the record does not hold. determination requires shariah-panel sign-off.]
SKIN COMPATIBILITY
Irritancy Rating: 1/5 – very low
Comedogenicity Rating: 0/5 – non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Hydroxypropyl starch phosphate's modification (adding hydroxypropyl for water solubility and phosphate for stability) demonstrates the synthetic chemistry required to convert native starch (which retrograde/crystallise making cosmetic gels unstable) into a shelf-stable cosmetic thickener — natural modification enabling practical formulation performance while retaining biodegradability.
Last Verified: 2026-03-12
Primary Sources: Cosing database,cosmos standard